Printing-press.



no. 629,9". Patented Aug. l, 1899.

. T. M. NORTH.

PRINTING PRESS.

(Application filed HGV. 22, 1897.)

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PRINTING PRESS.

{Appnm'n med Nov. 22, 1897.)

5 Sheets-Sheet 2.

(No Model.)

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No. 629,9II. Patented Aug. I, I899. T. M; NGR'I'H.

PRINTING PRESS.

(Application led Nov. 22, 1897.)

5 Sheets-Sheet 3.

(No Model.)

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No. 629,9H. Patented Aug. l, |899.

T. M. Nonni. PRNTING PRESS.

(Application med Nov. 22, 1397,) i No Model.)

5 Sheets-Sheet 4.

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Patented Mg.y l, |899.

T. M. unam. PRHITING PRESS. (Application med Nov. 22, 18971.)

5 Sheets- Sheet 5.

{No Model.)

' UNiTED STATES? THOMAS M. Nostri-L 'ONEW YORK, n.

Y., Assiettes rro ,ROBERT HOE, THEO-r DORE I-I. MEAD, AND CHARLES W.CARPENTER, OF SAMEPLACF.;

PRINTING-Pases.

sPEcIFIcA'rri forming part 'ofLttners Patent No. 629,911, este@ August1, 189e. Application iiled November 22; 1897. Serial NO- 659,507. (Nomodel.)

To @ZZ whom/ it may concern:

Be it known that I, THOMAS M. NORTH, a subject of the Queen of GreatBritain, residing at New York, (Brooklym) county of Kin gs,and

State of New York, have invented certain new and useful Improvements inPrinting-Presses, fully described and represented in the followingspecification and the accompanying drawings, forming a part of the same.

While the present invention is applicable to various constructions ofprinting-presses, it is shown herein as applied to that form ofrotary-cylinder pressin which the impressioncylinder is of less diameterthan the platecylinder and makes but one revolution and also comes to astop during each revolution of the plate-cylinder.

The invention includes mechanism fortripventing the attempted operationof the tripping mechanism while the im pression-cylinder is in motion.

The invention consists in certain part-s,

improvements, and combinations, as will-be hereinafter described, andfully pointed ont in the claims hereunto appended. y

. In the drawings hereto annexed and forming a part of thisspecification, Figure l is a side elevation of a press embodying myinvention. Fig. 2 is a plan4 view of the same, showing theimpression-cylinder partly in section. Fig. Bis a View, on an enlargedscale, of one end of the impression and plate cylinders. Fig. Li is aview, on the same scale, of the other end of the impression-cylinderanda part of the plate-cylinder. Fig. 5 is aplan y view, on the same scale,of the parts shown in 5o Fig. 4, the line of sight being in thedirection ofv the arrow of Fig. 4. Fig. G is a view, on

.y the saaie of Fig. 1, of the end of the plate-@yt inder,illustratingthe operation of the devices for controlling the position of theinking-rollers, a group of inking-rollers being shown as raised abovethe surface of the plates on the cylinder and a group of rollers beingshown as in contact with the same. Fig. is also a view, on the samescale, ofthe end of the platecylinder and shows the press in astate ofrest, 6o

in which both groups of inking-rollers are lifted above the surface ofthe cylinder-plates. Fig. 8 is an end view of, the press shown in Fig.Y7,' the line of sight being that indicated bythe arrow in Fig. 7. 65

Referring to the drawings, A is the frame of a press embodying myinvention, B a plate or form cylinder, and C an `impression-cylinder.The cylinders are provided with the segmental gears D E and the coupling-levers 7o F F for transmitting intermittent and gradcated mptionfrom the cylinder B to the cylin der C and causing the latter cylinderto come to a stop during each revolution of the former cylinder, thismechanism being the same and operating in the same manner as describedin my application, Serial No. 618,024, tiled January 5, 1897. Thecam-actuated brake Gr and stop H for arresting the motion of theimpression-cylinder andlocking it in a posi- 8o tion of rest are alsoprovided, as described in said application. It should, however, beunderstood that I may employ other means than that above described forrotating the impression-cylinder. I do not limit myself to the rotationof the impression-cylinder through connections with the plate-cylinder.

In order that the rot-ation of the impressioncylinder may be trippedwhen desired, the segment E is formed on a wheel or short cylgo inder I,detached from the cylinder G and rotating freely on the cylinder-shaftJ. The wheel I has a flange 7l projecting within the cylinder andprovided with a notch i. A shaft K is journaled in the two ends of thecylinder and carries keyed upon it an arm 7c, provided with a lng k",adapted to lit the notch t". At the other .end of the shaft K and beyondthe end of the cylinder'is abellcrank lever Il, on one arm of which isal stud roo l and to the other arm of which is connected a spring Z',which exerts a pressure upon the shaft K to force the lug 7o" into thenotch fi". Projecting from the end of the cylinder is another stud Z.Keyed upon the short shaft M, journaled in the frame, is the hand (orfoot) tripping-lever m. The shaft M is in line with the shaft K when thecylinder is stationary and carries on its end inside the frame athree-armed lever N. One arm n of this lever carries two lugs which areadapted to engage with the stud Z", as shown in Fig. 4. The second arm ncarries two lugs adapted to engage with the stud Z, as shown in the samefigure. The third arm n" has pivoted thereto a link O, the other end ofwhich is slotted and rides over a pin o, projecting inward from thepress-f rame opposite the platecylinder. This link carries alozenge-shaped stop o', which is adapted to engage with a segmental ribo, projecting from the end of the plate-cylinder. The operation of thismechanism is as follows: In normal operation the impression-cylinder islocked to the wheel I by the lug Zt entering the notch t, and the tWomove together in all respects as though a solid cylinder. When it isdesired to trip the cylinder, the lever m is elevated, whereupon the lug7c" is withdrawn from the notch i, the shaft K being rocked by theengagement of the lugs on arm n/ withv the stud Z. At the same time thelugs on arm n engage with stud Z", and the cylinder is thereby held fastin the position it then occupies. The wheel I novi7 revolves alone inconnection with the plate-cylinder, leaving the impressioncylinder atrest. When it is desired to prevent the revolution of the cylinder forsome time, a pin may be inserted under the tripping-lever, as shown inFig. 4. Where the cylinder is merely tripped because of the failure tofeed a sheet and it is desired to lose but one revolution, thetripping-lever is released at once after `being thrown, as described,and the spring Z forces ,the lug Zr,

into the notch t" when this notch next comes opposite the lug, therebyagain locking the cylinder to the wheel I.

It is necessary to prevent attempting to trip when theimpression-cylinder is in motion, as by so doing the mechanism would besubjected to probable injury, and to this end the safety device,consisting of the link O and connected parts, is provided. The segmentalrib o" is of such length and position as to lie in front of the lozengeo' when the impressioncylinder is in motion and prevent movement of thetripping-lever, as shown in Fig. 3. When the impression-cylinder hascome to rest, the rib o is out of the way and the link O is free to moveto the position shown in Fig. 4.

It Will be observed that the wheel I, owing to the extension P, on whichare placed the studs or rollers p p', with which the couplingleversengage, may not have sufficient weight to of itself accurately preserveits position when disconnected from the impression-cylinder, its brakeand stop, and from the platecylinder. To cause it to hold its positionwhen disconnected, the outer surface of the extension P is made concavein about the curvature of the plate-cylinder, and the latter is providedwith a segmental abutment P,whicli is of such a length and so placed asto be op'- posite to and in contact with the extension P during thatpart of the revolution of the plate-cylinder during which the cylinderis disconnected from the wheel I. The curvature of this abutment is thesame as that of the extension P, and it prevents displacement of theWheel I during this time.

The mechanism for manipulating the inkrollers will next be described.W'hen the ink is first put in the fountain, it is necessary to makeseveral revolutions of the press in order to get sufficient ink on theink plate and rollers, and during this time the rollers must not come incontact with the forms. To provide for this necessity, the ink-rollersare mounted upon brackets R R', sliding in the frame of the press, andeach provided with a stud r. On each end of the cylinder-shaft ismounted a cam S, having a raised portion. On each end of the shaft,between the cam S and the end of the cylinder, is pivoted a lever s,which carries pivoted levers S" s", having rollers which run upon thecams S. In the position of levers s shown in Fig. 6 these levers s' s"are in radial line with. the studs o", and when their rollers ride onthe raised portion of cams S they push the inkroller brackets outward,so that the plate may pass under them Without contact. The raisedportions of cams S correspond in length, of course, with the portion ofthe circumference of the cylinder occupied by the forms.

Vhen the press is to be used for printing, the levers's are carried tothe position shown in Fig. l, the studs r being in that position out ofthe range of movement of levers s s.

`When the press is stopped, it is desirable to lift the ink-rollersclear of the plates, and to do this the levers S are provided withraised IOO IIO

inclines s'", which make contact with studs r when the levers s move tothe position shown in Fig. Zand push up the bracketsRR. The levers s maybe operated by two segments, one on either side of the machine,connected by a shaft, as shown.

My invention includes an improvement relating to the ink rollers, asfollows: The ductor-roll Y oscillates between the fountainroll U and thedistributing-cylinder Vin the usual manner, it being journaled in armsfixed to the rock-shaft u. From the cylinder V roller V conduct-s theink to a group of inkrolls on the side next to the impression-cylinder,and roller V conducts the ipk to a group on the opposite side. Now it isplain that if the roller V runs constantly in contact with cylinder Vand its group of form-rollers the larger part of the ink will be carriedby roller V' to the group of ink-rollers nearest the impression-cy1inder. This is detrimental to good printing, since the ink does nothave sufficient distribution. the larger part of the ink could be sentto the other group of ink-rollers, when it would be better distributedbefore printing. To accomplish this, I mount the roller V ou bracketsswinging on the shaft of distributing-cylinder V. On each bracket isformed a toothed segment which gears withsegments placed on each end ofthe shaft u. Therefore when the shaft u rocks to throw the roller U intocontact with cylinder V it lifts roller V out of contact with its groupof ink-rollers. The irst and larger part of the ink thus passes onto theroller V and the other group of inkrollers and is more thoroughlydistributed before reaching the plates than it otherwise would be. Atthe same time the roller Vl is kept in contact with cylinder V and itsfull distributing-powerpreserved. Ofcourse any other suitable form ofmechanism may be used for causing the vibration of roller V withoutdeparting from my invention.

'When the machine is used to print from planographic surfaces, asuitable damping mechanism will of course be employed. Such a dampingmechanism is indicated at W in Fig. 1.

What I claim is-` l. In a printingmachine, the combination with aprinting-couple, of amember intermittentlyr rotated in unison with onemember of the couple, connections between said member and the othermember of the couple, and means for interrupting said connections atwill, substantially as described.

2. In a printingmachine, the combination with a rotatingprinting-couple, of a member intermittently rotated in unison with onemember of the couple, connections between said member and the othermember of the couple, and means for interrupting said connections atwill, substantially as described.

3. In a printing-machine, the combination.

with a rotating form-carrying cylinder, of a rotatingimpression-cylinder, a memberintermittently rotating in unison with the`formcylinder, connections between said member and the impressioncylinder, and means whereby said connections maybe interrupted at will,substantially as described.

4. In a printing-machine, the combination with a printing-couple, of amember, means intermediatethe said member and one member of the couple,whereby a variable rotating movement is imparted to said member,

connections between said member and the other member of the couple, andmeans for interrupting said connections at will, substantially asdescribed.

5. The combination with a pair of rotating members, of two pairs ofengaging devices intermediate the members, one of the engaging surfacesof each pair being inclined toits path of movement, a third member,connections between it and one of the other members, and meansinterrupting said connections at will, substantially as described.

It would be better'if of a gear, means whereby said gear has a variablemovementimparted to it by one of the members of the couple, connectionsbetween said gear and the other mem ber of the couple, y

and means for interrupting said connections at will, substantially asdescribed.

' S. The combination with a printing-couple, of a gear, means wherebythe gear has its movement gradually increased until it runs in unisonwith one member of the couple and then gradually decreased until it isbrought to a stop, connections between said gear and the other member ofthe couple, and means wherebyY said connections may be interrupted atwill, substantially as described. l y v. y

9. The combination with a rotating printing-couple, of a gear, meanswhereby the ge'ar has its movement gradually increased until it runs inunison with one member of the couple and then gradually decreased untilit is brought to a stop, connections between said gear and the othermember ot' the couple, andV means whereby said connections may be in- Iterrupted at will, substantially as described. lO. The combination witha constantly-ro-A tat-ing form-carrying cylinder,0f a gear, meansintermediate the form-cylinder and the gear whereby the gearhas itsmovement constantly increased from a position of rest until itrnns inunison with the-form-cylinder and then gradually decreased until it isbrought to a stop, an impression-cylinder, connections be- 'tween theimpression-cylinder and the gear, and means whereby said connections maybe interrupted at will,substan tially as described.

ll. The combinationwith a rotating member, of a second rotating member,means for connecting and disconnecting the two members, means formaintaining the second member in a position of rest when it isdisconnected from the first member, a third member, connections betweenit and the second member,and means for interrupting said connections atwill, substantially as described.

12. In a prin ting-machine, the combination with a form-carryingcylinder, of a 'member intermittently rotated from the form-carryingcylinder and when not so rotated is at rest, means for maintaining themember in a position of rest, an impression-cylinder, connectionsbetween said member and the impressionu-cylindeigand meansforinterrupting said connections at will, substantially as described.

13. In a printingmachine, the combination with a constantly-rotatingform-cylinder, of

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'I brought to a position of rest once during each revolution, a tripmechanism for interrupting the driving connection between the twocylinders, and means connected to one of the cylinders for locking thetrip mechanism against operation except when the impression-cylinder isin a position of rest, substantially as described.

15. In a printing-machine, the combination with a constantly-rotatingform-cylinder, of an impression-cylinder, a gear, means intermediate thegear and the form-cylinder whereby said cylinder imparts a variablemovement to the gear, connections between the gear and theimpression-cylinder, a trip for interrupting said connections, and meansfor preventing the operation of the trip except at specified times,substantially as described.

16. In a printing-machine, the combination with a constantly-rotatingform-cylinder, of an impression-cylinder, a Vmember intermediatev thetwo cylinders, devices whereby the member is intermittently rotated bythe impression-cylinder and when not so rotated `is at rest, means forlocking the member in its position of rest, connections intermediate themember and the impression-cylinder, a trip mechanism forinterruptingsaid connections, means for preventing the operation of the tripmechanism except at specified times, and means for locking theimpression-cylinder when the trip mechanism has disconnected it from themember, substantially as described.

17. In aprinting-machine, the combination with a constantly-rotatin gform-carrying cylinder, of an impression-cylinder, means for giving arotary motion to the impression-cylinder and for bringing it to a stoponce during each revolution of the form-cylinder, a trip mechanism forinterrupting the driving connections of the impression-cylinder, meansfor preventing the operation of the trip mechanism except at speciiiedtimes, a locking device for locking the impression-cylinderin itsposition of rest, and means for simultaneously operatin g the tripmechanism and the locking device, substantially as described.

18. In a printing-machine, the combination with a constantly-rotating.form-cylinder, of an impression-cylinder, means whereby theimpression-cylinder is driven from the formcylinder and brought to aposi-tion of rest once during each revolution, a trip mechanism forinterrupting the driving connections between the form and impressioncylinders, means for preventing the operation of the trip mechanismexcept at specified times, a locking mechanism for holding theimpression-cylinder in a position of rest when tripped, and means forsimultaneously operating the trip and the locking mechanisms,substantially as described.

19. The combination of a plate or form cylinder, an impression-cylinder,a wheel mounted on the shaft of theimpression-cylinder but separatetherefrom, means for connecting the plate-cylinder with the wheel togive rotary motion thereto during a portion of each revolution of theplate-cylinder, and means for connecting and disconnecting at will theimpression-cylinder to and from said wheel, substantially as described.

20. The combination of a plate or form cylinder, an impression-cylinder,means for connecting the two cylinders during a portion of therevolution of the plate-cylinder, means for interrupting the drivingconnections between the two cylinders at the will of the operator, and asafety device for preventing attempted disconnection when theimpressioncylinder is in motion, substantially as described.

21. The combination of a plate or form cylinder, an impression-cylinden'a wheel mounted on the shaft of theimpression-cylinder but' separate therefrom, means for connecting theplate-cylinder with the wheel to give rotary motion .thereto during aportion of each revolution of the plate-cylinder, means for connectingand disconnecting at will the impression-cylinder to and from saidwheel, and a safety devicev for preventing attempted disconnection whenthe impression-cylinder is in motion, substantially as described.

22. The combination of a plate or form cylinder, an impression cylinder,segmental gearing, coupling-levers carried on one of the cylinders, saidgearing and coupling-levers operating to connect the two cylindersduring a portion of the revolution of the platecylinder, and means forinterrupting the driving connection between the two cylinders at thewill of the operator, substantially as described. i f

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

THOMAS M. NORTH.

Witnesses:

F. W. H. CRANE, E. L. SPEIR.

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